Improvement in ingot-molds



Nl.V T. MJUNEY.

ingot Mplds.

Patented Dec.16,873.

UNITED STATES PATENT OFFICE MATHEW T. MOONEY, 0F JOHNSTOVN,PENNSYLVANIA.

IMPROVEMENT IN lNGOT-MOLDS.

Specilication forming part of Letters Patent N o. 145,677, datedDecember 16, 1873 application filed August 19, 1873.

To all whom it may concern:

Be it known that I, MATHEW T. MooNEY, of Johnstown, in the county ofCambria and State of Pennsylvania., have invented a new and valuableImprovement in Molds for Steel Ingots and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the annexed drawingsmaking a part of this specification, and to the letters and igures ofreference marked thereon.

Figure l of the drawings is a representation of a plan view of the ingot-mold. Fig. 2 is a bottom view of the mold and ingot. Fig. 3 is a topview of the same. Fig. 4 are views of the steel ingot. Fig. 5 is a viewof the described rollers. y

This invention relates to an improvement in the manufacture ofcast-steel ingots, out of which to produce railroad-rails.` My object isto improve the molds by forming elevations on the interna-l surfaces oftheir walls, and corresponding depressions or grooves externally, sothat each wall presents one expansible corrugat-ion, for the purpose ofpreventing the molds cracking from sudden expansion or contraction. A

In the accompanying drawings, A represents my improved mold, which isquadrilateral in shape, and tapered from one end to the other, as shownby Fig. l, and also provided with eyes, for the purpose of attachingcrane-A hooks to it, to lift it and carry it from one place to another.The four walls composing this mold are centrally corrugatedthat is tosay, each wall has a convex ribbed surface, b, formed on it internally,and a corresponding concavity, a., formed on it externally, as shown inthe end views, Figs. 2 and 3. The corners cJ of the mold are more orless rounded. This mold is coated with soot or other carbonaceoussubstance, usually the practice before pouring the meta-1 into it toform the ingots, for the purpose of preventing the steel `adher- -ing toor burning the surfaces with which it The corrugated shape of the moldprevents it from cracking under sudden extremes of heat and cold, andthe knocks which are necessarily given to it for the purpose ofloosening and separating the ingots from it.

The corrugations present a greater amount of superficial cooling-surfacethan is presented in the old and well-known dat-surface ingotmolds, andhence the process of cooling the cast ingots is greatly expedited.

The ingot formed in such a mold will cool more uniformly throughout thanthe ingots produced in the old mold, and hence the ingots are morehomogeneous tha-n ingots hitherto produced.

Furthermore, my improved ingots present on each side a centrallongitudinal groove, o', as above stated, which not only increasessurface in a given area, but also affords a means for centrally guidingthem between rollers, which are represented in Fig. 5, but not hereinclaimed. The rollers C C are langed at c o, to prevent undue lateralspread of the in gots. They are also constructed with annular beads d,which are centrally located between the flanges, and which are of ashape corresponding to the grooves b in the ingots, that they may holdthe ingots in place vagainst lateral displacement while they are passedbetween the rollers.

Another advantage of the grooves b in the ingots is, that during theheating and cooling of them in a furnace suitably adapted to thepurpose, the grooves b allow a free circulation of the highly-heated orcooler air beneath the ingots. The grooves b in the ingots also allowthem to be more rmly and safely grasped between the jaws oflifting-tongs than can be done with the old and well-known flat-facedingots.

What I claim as my invention, and desire to secure by Letters Patent,is-

A mold corrugated internally and externally, in which to cast steel ingots, substantially as described.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

MATHEW T. MOONEY.

